Brush insert



FIG. 1 is an exploded top, front, and right perspective view of the brush insert, shown in an environment of use;

FIG. 2 is a top, front, and right perspective view of the brush insert;

FIG. 3 is a front perspective view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a right elevation side view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a rear elevation view thereof;

FIG. 10 is a cross-sectional view thereof, taken through line 10-10 of FIG. 4 ;

FIG. 11 is a front cross-sectional view thereof, taken through line 11-11 of FIG. 5 ; and,

FIG. 12 is a rear cross-sectional view thereof, taken through line 12-12 of FIG. 5 .

The broken lines in FIG. 1 represent environmental structure. All other broken lines illustrate portions of the brush insert. The broken lines form no part of the claimed design. 

CLAIM The ornamental design for a brush insert, as shown and described. 